JP2735856B2 - Inner surface lining method of pipe and lining pipe - Google Patents
Inner surface lining method of pipe and lining pipeInfo
- Publication number
- JP2735856B2 JP2735856B2 JP2310789A JP2310789A JP2735856B2 JP 2735856 B2 JP2735856 B2 JP 2735856B2 JP 2310789 A JP2310789 A JP 2310789A JP 2310789 A JP2310789 A JP 2310789A JP 2735856 B2 JP2735856 B2 JP 2735856B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- tube
- lining
- target
- reinforcing strip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Lining Or Joining Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 この発明は、管の内面ライニング工法、即ち水道管、
ガス管等の地中埋設管などの簡易補修工法として、その
内面に別途管体を内張り施工するライニング工法及びそ
れに用いるライニング管に関する。The present invention relates to an inner surface lining method for pipes, that is, a water pipe,
As a simple repair method for underground pipes such as gas pipes, the present invention relates to a lining method for separately lining a pipe on the inner surface thereof and a lining pipe used therefor.
従来の技術とその問題点 従来、亀裂その他の損傷を生じた前記のような既設管
を補修するための内面ライニング工法として、ライニン
グ用材料に柔軟な合成樹脂製チューブを用い、これをラ
イニング対象管内に挿入後、加圧流体を導入して膨張さ
せ、接着剤を介して対象管内面に貼着せしめる工法が知
られている。Conventional technology and its problems Conventionally, as an inner lining method for repairing an existing pipe that has cracks or other damage as described above, a flexible synthetic resin tube is used as a lining material, and this is used in a pipe to be lined. A method is known in which a pressurized fluid is introduced and expanded after being inserted into a target tube via an adhesive.
しかし、この工法による場合、接着剤をチューブ外面
または既設対象管の内面に塗布する作業を必要とし、該
作業が相当に煩雑であるばかりでなく、往々にして接着
不良部分を生じ易く、部分的にチューブが管内面から剥
離するおそれが大で、内張り状態の保持性の点で信頼性
に欠けるという本質的かつ重大な問題があった。However, in the case of using this method, it is necessary to apply an adhesive to the outer surface of the tube or the inner surface of the existing target tube, and this operation is not only considerably complicated, but also often causes a poor adhesion part, In addition, there is a great risk that the tube may be peeled off from the inner surface of the tube, and there is an essential and serious problem that the reliability of the lining condition is poor.
また、このような問題点を解決するための従来提案と
して、ライニング対象管の内径よりも小さい外径の保形
性のある合成樹脂管をライニング用管体として用い、こ
れを対象管内に挿入したのち、内面側から加熱し軟化せ
しめた状態で内部に拡管用プラグを導通させることによ
り拡管し、対象管の内面に密着せしめるものとするライ
ニング工法(特開昭63−162221号)や、またライニング
用管体として、同じく保形性を有するが対象管の内径に
対応する外径をもった合成樹脂製管を用い、これを、外
径を減ずるように断面形態を変形させた状態で対象管内
に挿入し、しかるのち、該管体を内面側から加熱加圧し
て元の形状に復元させることにより、対象管の内面に沿
接させるライニング工法が提案されている(特開昭63−
203316号)が提案されている。In addition, as a conventional proposal for solving such a problem, a synthetic resin pipe having a shape retaining shape having an outer diameter smaller than the inner diameter of the pipe to be lined was used as a lining pipe, and this was inserted into the target pipe. A lining method (Japanese Patent Laid-Open No. 63-162221), in which the pipe is expanded by passing a plug for expansion into the inside in a state where the pipe is heated and softened from the inner side to bring the pipe into close contact with the inner surface of the target pipe, A tube made of a synthetic resin having the same shape-retaining property but having an outer diameter corresponding to the inner diameter of the target pipe is used as the pipe body, and the cross-section is deformed so as to reduce the outer diameter. Then, a lining method has been proposed in which the pipe is heated and pressed from the inner surface side to restore the original shape, so that the pipe is brought into contact with the inner surface of the target pipe (Japanese Patent Laid-Open No. 63-63).
203316) has been proposed.
しかしながら、上記先行提案に係る工法による場合、
ライニング対象管が比較的短かくかつ曲がり部分を有し
ない直管型のものである場合にはさして支障はないもの
ゝ、対象管が長く、しかも曲折部分を有するような場合
には、ライニング用管体の挿入を円滑に進めることがで
きず、該挿入作業に困難を来たして甚だしくは施工不能
になったり、挿入のために無理にライニング管体を牽引
すると対象管内面との強い摺接により管体に破れを生
じ、あるいは破れに至らないまでも深い擦過傷を受け、
これに起因してライニング管体の膨管時あるいは復元時
に破れや亀裂を生じるというような問題点があった。However, in the case of the method according to the preceding proposal,
There is no problem if the pipe to be lined is of a straight type having a relatively short length and no bent part. If the target pipe is long and has a bent part, the lining pipe Insertion of the body cannot be performed smoothly, making the insertion work difficult and severely impossible to construct, or if the lining pipe is forcibly pulled for insertion, the pipe will be in strong contact with the inner surface of the target pipe. The body is torn, or deeply abraded even if not torn,
As a result, there has been a problem that the lining tube is torn or cracked when the tube is expanded or restored.
この発明は、更にこのような問題点を解決することを
目的としてなされたものである。The present invention has been made to further solve such a problem.
問題点を解決するための手段 この発明は、ライニング管体として従来の前記提案工
法と同じく保形性のある熱可塑性合成樹脂管を使用する
が、周壁に軸線方向に沿って抗張性補強条を埋設したも
のを用いることにより、加熱軟化状態のもとでの牽引操
作でライニング対象管の曲がり部分にも支障なく簡易に
挿入しうるものとすると共に、上記の加熱軟化及び挿入
後の膨管操作をライニング管内への高温流体の導入によ
って簡易に行いうるようにしたものである。Means for Solving the Problems The present invention uses a thermoplastic synthetic resin pipe having the same shape preserving property as the above-mentioned conventional construction method as the lining pipe body. By using a buried tube, it is possible to easily insert it into the bent portion of the pipe to be lined by the pulling operation under the heat softened state without hindrance, and to expand the pipe after the above heat softening and insertion. The operation can be easily performed by introducing a high-temperature fluid into the lining pipe.
即ち、この発明は、対象管の内面に内張りすべきライ
ニング用管体として、上記対象管の内径よりも外径の小
さい熱可塑性樹脂管からなり、周壁に部分的に軸線方向
に沿って1ないし複数条の抗張性補強条が埋設された保
形性のある管体を用い、該管体を内部に高温流体を導入
することによって加熱軟化させながら一端より牽引して
前記対象管内に挿入し、次いで上記高温流体の圧力を上
げて管体を膨張させ対象管の内面に密着させたのち、冷
却固化させることを特徴とする管の内面ライニング工法
及び該工法に用いる上記構成のライニング用管体を要旨
とする。That is, the present invention comprises, as a lining pipe body to be lined with the inner surface of the target pipe, a thermoplastic resin pipe having an outer diameter smaller than the inner diameter of the target pipe, and the peripheral wall partially extends along the axial direction by one to one. Using a tubular body having a shape-preserving property in which a plurality of tensile reinforcing strips are embedded, pulling the tubular body from one end while heating and softening it by introducing a high-temperature fluid therein, and inserting the tubular body into the target pipe. Then, the pressure of the high-temperature fluid is increased to expand the pipe so that the pipe is brought into close contact with the inner surface of the target pipe, and then cooled and solidified, and the lining pipe having the above structure used in the pipe lining method. Is the gist.
この発明のライニング工法が適用される要補修対象管
の種類としては、例えば上下水道管、都市ガス管、排気
管などの既設の流体移送管および電気配線などの収納管
であって、金属管、ヒューム管、アスベスト管、合成樹
脂管等よりなるものが挙げられる。The types of pipes requiring repair to which the lining method of the present invention is applied include, for example, existing fluid transfer pipes such as water and sewage pipes, city gas pipes, exhaust pipes, and storage pipes such as electric wiring, metal pipes, Examples include a fume pipe, an asbestos pipe, and a synthetic resin pipe.
この発明の工法の適用によって上記対象管内面にライ
ニングすべきライニング用管体は、ポリ塩化ビニル、ポ
リエチレン、ポリプロピレンなどの熱可塑性樹脂製であ
り、かつ常温において充分な保形性を有するいわゆる硬
質の合成樹脂製管が用いられる。The lining tube to be lined with the inner surface of the target tube by applying the method of the present invention is made of a thermoplastic resin such as polyvinyl chloride, polyethylene, or polypropylene, and has a sufficient shape-retaining property at room temperature, so-called hard tube. A synthetic resin tube is used.
該管体は、通常押出成形法によって成形されるもので
あり、対象管の内径よりも95〜60%程度の範囲に外径を
小さく成形されたものが用いられる。外径が対象管の内
径の95%をこえるものでは、対象管内への挿入操作が困
難となり、また60%未満の細いものでは、既設対象管へ
の挿入後半径方向に拡張させた際に、周壁に著しい偏肉
を生じたり、薄くなった部分に亀裂を生じたりするおそ
れが派生する。最も好ましくは、管体の外径は対象管の
内径の90〜70%程度とするのが良い。また、管体の肉厚
は、これが最終的に対象管の内面にライニングされたと
きに必要となる肉厚が確保されるように、予めそれより
も若干厚く設定される。通常、要求されるライニング後
の肉厚は1〜10mm程度の範囲であるが、対象管の用途、
口径、および膨張率などに応じて適宜に決定される。The tube is usually formed by an extrusion method, and a tube whose outer diameter is reduced to about 95 to 60% of the inner diameter of the target pipe is used. If the outer diameter is more than 95% of the inner diameter of the target pipe, the insertion operation into the target pipe becomes difficult, and if the outer diameter is less than 60%, it is expanded radially after insertion into the existing target pipe. There is a risk that the wall thickness will be significantly uneven and the thinned portion will be cracked. Most preferably, the outer diameter of the tube is about 90 to 70% of the inner diameter of the target tube. The wall thickness of the tube is set to be slightly larger in advance so that the wall thickness required when the tube is finally lined on the inner surface of the target tube is secured. Usually, the required wall thickness after lining is in the range of about 1 to 10 mm.
It is appropriately determined according to the diameter, the expansion rate, and the like.
また、ライニング管体は、その周壁に抗張性補強条が
埋設一体化されたものが用いられる。これは、主として
管体の挿入時に負荷される引張り荷重を負担して円滑な
挿入操作を可能なものとすると共に、好ましくは更に対
象管内面との摺接による摩擦抵抗を減少して愈々挿入操
作を行い易いものとし、また管体表面を保護して深い擦
過傷がついたり破れを生じるのを防止するものである。
従って、抗張性補強条の材質としては、ある程度の抗張
力性と耐熱性、可撓性を有するものであれば使用可能で
あり、具体的には例えばポリアミド、ポリエステル、ポ
リウレタン、ポリプロピレン、ビニロン、アクリル等の
有機合成繊維、麻、木綿等の天然繊維、あるいは無機繊
維による糸条体、細幅帯状の編織布等が好適に用いられ
る。而してこれらの材質からなる抗張性補強条は、管体
の周壁の内部に埋設しても良いが、好適には梱包用バン
ドとして広く知られているような有機繊維織布による細
幅の帯状体を用い、その片面を外面に露出させた状態で
管体の外表層部に埋設せしめたものとすることが好まし
い。またその配置は管体の周壁外面に、4〜10条程度を
等間隔に配置するのが一般的かつ好適であるが、隣接す
る補強条間には充分な間隔を存置して、管体の自由な半
径方向の拡張を妨げないものとすることが必要である。
この意味から、管体の周壁の全周にわたって抗張性材料
が被覆されあるいは埋設された合成樹脂管は、この発明
の適用から除外される。Further, the lining pipe used is one in which a tensile reinforcing strip is embedded and integrated in the peripheral wall. This makes it possible to smoothly perform the insertion operation by mainly bearing the tensile load applied at the time of insertion of the tube, and preferably further reduces the frictional resistance due to the sliding contact with the inner surface of the target tube to further increase the insertion operation. And protects the surface of the tube to prevent deep abrasions and tears.
Accordingly, as the material of the tensile strength reinforcing strip, any material having a certain degree of tensile strength, heat resistance, and flexibility can be used. Specifically, for example, polyamide, polyester, polyurethane, polypropylene, vinylon, acrylic Or the like, natural fibers such as hemp, cotton, or the like, or yarns made of inorganic fibers, narrow band-shaped woven fabrics, and the like. The tensile reinforcing strip made of these materials may be buried inside the peripheral wall of the tube, but is preferably made of an organic fiber woven cloth widely known as a packing band. It is preferable to embed it in the outer surface layer of the tubular body with one side thereof exposed to the outer surface. In addition, it is generally and preferably arranged about 4 to 10 strips at equal intervals on the outer surface of the peripheral wall of the pipe, but there is a sufficient gap between adjacent reinforcing strips, and It is necessary that free radial expansion is not impeded.
In this sense, a synthetic resin pipe covered or buried with a tensile material over the entire peripheral wall of the pipe body is excluded from the application of the present invention.
しかしながら、抗張性補強条は、挿入時に対象管の内
面に摺接する管体の周壁の一部のみに偏在する形に配設
するものとしても良い。従って断面の半円周の周壁部分
すなわち片半部のみに複数条の抗張性補強条を設けたも
のとしても良い。However, the tensile reinforcing strips may be disposed so as to be unevenly distributed only on a part of the peripheral wall of the pipe that slides on the inner surface of the target pipe at the time of insertion. Therefore, a plurality of tensile reinforcing strips may be provided only on the peripheral wall portion of the semicircle of the cross section, that is, only on one half.
このような抗張性補強条の埋設は、管体の押出成形時
に同時に行うものとしても良いし、押出直後に別途その
周面に補強条を添接し、押圧手段をもって一部のみ埋込
み状態に貼合わせるものとしても良い。この場合、充分
な一体化をはかるために接着剤を併用してもよい。The embedding of such a tensile reinforcing strip may be performed simultaneously with the extrusion of the tubular body, or a reinforcing strip may be separately attached to the peripheral surface immediately after the extrusion, and only a part of the reinforcing strip may be stuck in the embedded state by pressing means. It may be combined. In this case, an adhesive may be used in combination for sufficient integration.
抗張性補強条を埋設した管体は、それを円形断面のま
ゝ用いる場合のほか、保管、あるいは輸送上の便宜のた
め、押出成形後、再び加熱軟化させて断面が偏平形状に
なるように変形させ、この状態で巻取り装置に巻き取っ
て使用することもある。In addition to using the tubular body with the tensile reinforcing strip embedded in it as a circular cross section, for the sake of convenience in storage or transportation, after extrusion molding, it is heated and softened again so that the cross section becomes flat. In this state, it may be wound up and used by a winding device.
上記ライニング用管体によるライニング操作は、先ず
該管体内にその一端から例えば高温の水蒸気等の高温流
体を導入し、これによって管体を内面側から加熱して軟
化せしめる。そしてこの軟化状態を保持しながら、一端
に接続したワイヤー等による牽引手段で対象管内に引き
込み、該管の全長に亘ってライニング用管体を挿入す
る。この際、抗張性補強条は、軟化して引張り耐力の減
少された樹脂管に対して補強作用を果し、引張り荷重を
負担して管体の有害な伸びを防止すると共に、外面に露
出状態に設けられた抗張性補強条は、特に対象管の曲が
り部分においてその内面に当接し、張り材としての役目
を果して管体の円滑な挿入を可能にすると共に、それに
深い傷がつくのを防止する。In the lining operation using the lining tube, first, a high-temperature fluid such as high-temperature steam is introduced into the tube from one end thereof, whereby the tube is heated and softened from the inner surface side. Then, while maintaining this softened state, it is pulled into the target pipe by a pulling means such as a wire connected to one end, and the lining pipe is inserted over the entire length of the pipe. At this time, the tensile reinforcing strip softens and acts as a reinforcing agent for the resin pipe having a reduced tensile strength, bears a tensile load, prevents harmful elongation of the pipe, and is exposed to the outer surface. The tension reinforcing strip provided in this state abuts against the inner surface, particularly at the bent portion of the target pipe, and serves as a tension member to enable smooth insertion of the pipe body and to cause deep damage to the pipe. To prevent
次に上記挿入完了後、管体の一端を閉塞し、他端から
導入される上記高温流体の圧力を上げて管体を半径線方
向に拡張させる。そして、この膨管操作により、管体の
外面を対象管の内面に密接させたのち、内部に導入する
流体を低温流体に置換し、管体を冷却固化させて所期の
ライニングを完遂する。Next, after the insertion is completed, one end of the tube is closed, and the pressure of the high-temperature fluid introduced from the other end is increased to expand the tube in the radial direction. Then, after the outer surface of the tube is brought into close contact with the inner surface of the target tube by this inflation operation, the fluid introduced into the inside is replaced with a low-temperature fluid, and the tube is cooled and solidified to complete the desired lining.
実施例 以下、この発明の実施例を、添附図面に基づいて説明
する。Embodiments Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
第1図ないし第4図は、この発明の工法によって曲が
り部(A1)(A2)を有する対象管(A)の内面にライニ
ングを施す場合の施工例を示している。FIG. 1 to FIG. 4 show construction examples in which lining is applied to the inner surface of a target pipe (A) having bent portions (A1) and (A2) by the method of the present invention.
こゝにライニング用管体(1)としては、上記対象管
(A)の内径(l1)に対し、95〜60%の範囲で外径(l
2)を小とした熱可塑性合成樹脂製管であって、外周面
に複数条の合成繊維織布からなる細幅帯状の抗張性補強
条(2)が所定間隔を置いて6列に埋設配置されたもの
で用いられている。上記管体(1)は、例えば塩化ビニ
ル樹脂をもって断面円形に押出成形し、この成形直後に
補強条(2)を外周面に押し当てゝ一部埋設状態に接合
一体化した一般的に硬質管と呼ばれるタイプのそれ自体
常温で充分な保形性を有するものである。Here, the outer diameter (l) of the lining tube (1) is in the range of 95 to 60% with respect to the inner diameter (l1) of the target pipe (A).
2) A tube made of a thermoplastic synthetic resin having a small size, in which narrow strip-shaped tensile reinforcing strips (2) made of a plurality of synthetic fiber woven fabrics are embedded in six rows at predetermined intervals on the outer peripheral surface. It is used in the arrangement. The tube (1) is, for example, extruded into a circular cross section with a vinyl chloride resin, and immediately after this molding, a reinforcing strip (2) is pressed against the outer peripheral surface. It has a sufficient shape-retaining property at room temperature per se.
ライニングに際し、先ず上記管体(1)は、その一端
から蒸気などの高温流体を導入することによって内面側
から管体の樹脂の軟化温度を僅かに超える程度の温度、
例えば塩化ビニルの場合80〜95℃程度の温度にまで加熱
される。従って、この加熱により管体(1)は軟化され
る。そこで、この加熱軟化状態を保ちながら、該管体
(1)をその一端に連結金具(3)を介して連結したワ
イヤーであるいはロープ等の索条(4)をもって牽引す
ることにより、ライニングを施すべき対象管(A)内に
引き込み、その全長に亘って挿入する。この挿入過程
中、管体(1)の軟化状態を保持するために、その一端
に取付けられる連結金具(3)は通孔(5)を有するも
のを用い、あるいは管端部に外気に連通する通孔を穿設
したものとして他端から導入される高温流体(G)の管
体内流通を維持することが必要である。また、連結金具
(3)は、管体(1)の把持を、その抗張性補強条
(2)を含む状態に行い、索条(4)による牽引力を直
接上記補強条(2)に及ぼしめるものとすることが必要
である。かゝる操作により、対象管(A)が長尺である
場合はもちろん、それに曲がり部(A1)(A2)を有する
場合にあっても、管体(1)にほとんど伸長変形を生じ
させることなく、それを円滑に対象管(A)内に引き込
んで挿入することができる。また、管体(1)は、対象
管(A)の曲がり部(A1)(A2)においてその内面に外
周面が強く摺接されるが、抗張性補強条(2)によって
滑り性が向上されるため、管体(1)は対象管(A)内
を比較的円滑に移動して挿入されると共に、上記補強条
(2)による保護作用で外周面に著しい擦過傷が与えら
れのが防止される。At the time of lining, first, the above-mentioned tube (1) is heated from the inner surface side by introducing a high-temperature fluid such as steam from one end thereof to a temperature slightly exceeding the softening temperature of the resin of the tube.
For example, in the case of vinyl chloride, it is heated to a temperature of about 80 to 95 ° C. Therefore, the tube (1) is softened by this heating. Therefore, while maintaining the heat-softened state, the tube (1) is lined by pulling it with a wire connected to one end thereof via a connection fitting (3) or with a rope (4) such as a rope. It is drawn into the target tube (A) to be inserted and inserted over its entire length. During this insertion process, in order to maintain the softened state of the tube (1), a connecting fitting (3) attached to one end of the tube (1) has a through hole (5), or communicates with the outside at the tube end. It is necessary to maintain the circulation of the high-temperature fluid (G) introduced from the other end as a through hole. In addition, the connecting fitting (3) grips the pipe (1) in a state including the tensile reinforcing strip (2), and directly applies the traction force of the cable (4) to the reinforcing strip (2). It is necessary to tighten. By such an operation, even if the target pipe (A) has a long length, and also has a bent portion (A1) (A2), the pipe (1) almost undergoes elongation deformation. Instead, it can be smoothly pulled into the target pipe (A) and inserted. In the tube (1), the outer surface is strongly slid on the inner surface at the bends (A1) and (A2) of the target tube (A), but the slip resistance is improved by the tensile reinforcing strip (2). As a result, the pipe (1) is relatively smoothly moved and inserted into the target pipe (A), and at the same time, the protective action of the reinforcing strip (2) prevents the outer peripheral surface from being significantly scratched. Is done.
管体(1)の挿入が完了すれば、その先端部を予め拡
管し、その拡管端部に栓(6)を装着するか、あるいは
他の任意の方法で一端を密閉状に閉塞する。そして、他
端の流体供給口金(7)から供給される高温流体(G)
の圧力を上げ、内圧を増大することによって管体(1)
を半径線方向に膨張させ、対象管(A)の内面に密着せ
しめる。こゝに負荷する圧力は概ね0.4〜2.0kg/cm2とす
る。When the insertion of the tube (1) is completed, the distal end is expanded in advance, and a plug (6) is attached to the expanded end, or one end is hermetically closed by any other method. And the high temperature fluid (G) supplied from the fluid supply mouthpiece (7) at the other end.
Pipe (1) by increasing the internal pressure
Is expanded in the radial direction, and is brought into close contact with the inner surface of the target pipe (A). The pressure applied here should be approximately 0.4 to 2.0 kg / cm 2 .
然るのち、上記栓(6)を取外し、流体供給口金
(7)から冷却空気等の低温流体を供給することによ
り、管体(1)を冷却固化せしめ、かつ両管端部の余剰
部分を切除して所期するライニングを完了する。Thereafter, the plug (6) is removed, and a low-temperature fluid such as cooling air is supplied from the fluid supply port (7) to cool and solidify the pipe (1) and to remove excess portions at both pipe ends. Resection to complete the desired lining.
このようなライニング工法は、実際上、短かい管路に
対してのみならず、10mをこえ、20〜30mというような長
い管路を対象管として行われることも多い。このような
長い対象管に対応する長尺のライニング用管体は、これ
を直管状のまゝ取扱うことは輸送面、保管面においても
多大の困難を伴うことが多い。従って、そのような場合
管体(1)は断面をやゝ扁平状のものに製作し、これを
巻取装置により巻き取った状態にして現場に輸送し、そ
のまゝの状態で加熱軟化し対象管に挿入して、膨管操作
時に元の円形に復元させるものとすることが望ましい。In practice, such a lining method is often performed not only for short pipes, but also for long pipes of more than 10 m and 20 to 30 m. In a long lining tube corresponding to such a long target tube, it is often difficult to handle the lining tube in a straight tube form in terms of transportation and storage. Therefore, in such a case, the tube (1) is manufactured to have a slightly flat cross section, which is wound up by a winding device, transported to the site, and heated and softened as it is. It is desirable to insert the tube into the target tube so that the tube can be restored to its original circular shape during the inflation operation.
第5図及び第6図はライニング用管体の変形構成例を
示す。5 and 6 show modified examples of the lining tube.
第5図の管体(11)は、その半円周に相当する断面の
片半部のみに、複数条の抗張性補強条(2)を所定間隔
に埋設状態に具備せしめたものである。この管体(11)
は、対象管(A)が1方向のみの曲がり部を有して、管
体の片側のみが対象管内面に強く摺接されるものである
というような場合において、補強条(2)の配設を必要
かつ十分とするものである。また、ライニング施工状態
時において抗張性補強条(2)の存する部分を上半部に
位置せしめて使用することにより、加熱及び膨管用の高
温流体として用いる蒸気の管内結露水(W)の影響か
ら、内圧を増大して管体を膨張させるさい、管体上部の
膨張を補強条(2)である程度抑制し、相対的に温度の
十分に上昇し難い下部の膨張度合と上部のそれと平均化
して、著しい偏肉状態が発生するのを防止しうる点でも
有用である。The pipe (11) shown in FIG. 5 has a plurality of tensile reinforcing strips (2) embedded at predetermined intervals only in one half of a cross section corresponding to the semicircle. . This tube (11)
In the case where the target pipe (A) has a bent portion in only one direction, and only one side of the pipe body is strongly slid on the inner surface of the target pipe, the reinforcing strip (2) is arranged. It is necessary and sufficient. In addition, the effect of the condensed water (W) in the steam used as a high-temperature fluid for heating and expanding the pipe by using the part where the tensile strength reinforcing strip (2) exists in the upper half part when the lining is being used. From the above, when the internal pressure is increased to expand the pipe, the expansion of the upper part of the pipe is suppressed to some extent by the reinforcing strip (2), and the degree of expansion of the lower part and the upper part, which are relatively difficult to sufficiently rise in temperature, are averaged with those of the upper part. Therefore, it is also useful in that a significant uneven thickness state can be prevented from occurring.
第6図の管体(21)は、その周壁の内部の外周面寄り
の位置に、多数本の有機繊維または無機繊維からなる補
強糸を抗張性補強条(12)として等間隔にかつ軸栓方向
に埋設したものである。このような補強糸入りの硬質合
成樹脂管の製造は、例えば特開昭63−260421号に開示さ
れる技術に準じて容易に行うことができる。このライニ
ング管体(21)による場合、対象管(A)への引込みに
際して上記補強条(12)が管体(21)の伸びを規制しそ
の円滑な挿入操作を可能にする。また、補強条(12)が
外周面近くに存在することで、管体(21)に有害な深い
傷がつくのを防止しうる点でも有用である。The pipe (21) shown in FIG. 6 has a plurality of reinforcing fibers composed of a large number of organic fibers or inorganic fibers as tensile strength reinforcing strips (12) at equal intervals and at a position near the outer peripheral surface inside the peripheral wall. It is buried in the direction of the plug. The production of such a hard synthetic resin tube containing a reinforcing thread can be easily performed, for example, according to the technique disclosed in Japanese Patent Application Laid-Open No. 63-260421. In the case of the lining pipe (21), the reinforcing strip (12) regulates the extension of the pipe (21) when drawing into the target pipe (A), and enables a smooth insertion operation. Further, the presence of the reinforcing strip (12) near the outer peripheral surface is also useful in that harmful deep damage to the pipe (21) can be prevented.
発明の効果 この発明は、ライニング管体をその内部に高温流体を
導入することによって加熱軟化させた状態で、対象管内
への牽引挿入を行うものであり、管体が比較的自由な撓
曲性を有するのに加えて、それ自体に抗張性補強条が埋
設されたものとなされていることにより、挿入時に管体
にかゝる引張り荷重を上記抗張性補強条で受けもち、管
体に有害な伸びや変形を生じるのを防止して、対象管内
への円滑な引込み挿入を可能とする。とくに、対象管に
曲がり部を有するような場合においても、その管路に沿
って支障なく円滑に挿入することができる。かつ、この
挿入後、加熱流体の圧力を上げて軟化状態のライニング
管体を膨張させ、対象管内面に密着させたのち冷却固化
するものであるから、対象管が曲管、異径管であり、あ
るいはその内面に多少の不陸や段差等を有するような場
合にあっても、支障なく対応して所期のライニングを施
すことができる。更に、管体の有する上記抗張性補強条
は、管体の挿入時において防護の役目を果し、管体に破
れ等の有害は破損を生じるのを防止しうる点でも有用で
ある。Advantageous Effects of the Invention The present invention is to perform traction insertion into a target pipe in a state in which a lining pipe is heated and softened by introducing a high-temperature fluid into the lining pipe, and the pipe has a relatively free flexible property. In addition to having a tensile strength reinforcing strip embedded in itself, the tensile strength reinforcing strip receives a tensile load applied to the pipe at the time of insertion, and Harmful elongation or deformation is prevented, and smooth retraction and insertion into the target tube is enabled. In particular, even when the target pipe has a bent portion, it can be smoothly inserted along the pipe without any trouble. And, after this insertion, the pressure of the heating fluid is increased to expand the softened lining pipe, and the solidified pipe is cooled and solidified after being brought into close contact with the inner surface of the target pipe, so that the target pipe is a curved pipe or a different diameter pipe. Alternatively, even in the case where the inner surface has some irregularities or steps, the desired lining can be applied without any trouble. Further, the above-mentioned tensile reinforcing strip provided in the tubular body plays a role of protection at the time of insertion of the tubular body, and is useful in that damage such as breakage or damage to the tubular body can be prevented from occurring.
特に、請求項(2)(4)(5)の如く、抗張性補強
条を好ましくは有機繊維織布による細幅帯状のものと
し、管体の外面に露出状態に設けたものとすることによ
り、該補強条をもって管体の挿入時に対象管の内面に対
する滑り性を向上し、愈々その挿通性を向上することが
できる。更に請求項(6)のように、抗張性補強条を管
体の外周面に等間隔に複数条設けることで、前記諸効果
を一層確実なものとし、かつ曲管への挿通性を更に向上
することができる。In particular, as in claims (2), (4) and (5), the tensile reinforcing strip is preferably formed in a narrow band shape made of an organic fiber woven fabric, and provided on the outer surface of the tubular body in an exposed state. Thereby, the sliding property with respect to the inner surface of the target pipe can be improved with the reinforcing strip when the pipe body is inserted, and the insertion property can be further improved. Further, as described in claim (6), by providing a plurality of tensile reinforcing strips on the outer peripheral surface of the pipe at equal intervals, the above-described various effects can be further ensured, and the penetrability into a curved pipe is further improved. Can be improved.
第1図は曲がり部を有する対象管に対するライニング用
管体の挿入工程を示す概略説明図、第2図はライニング
用管体の斜視図、第3図は管体を膨張させ対象管に密着
させる膨管工程の概略説明図、第4図はライニング施工
後の状態の管路の断面図、第5図及び第6図はそれぞれ
ライニング用管体の変形例を示す斜視図及び断面図であ
る。 (A)……対象管、(1)(11)(21)……ライニング
用管体、(2)(12)……抗張性補強条、(3)……連
結金具、(4)……牽引用索条、(5)……通孔、
(6)……栓、(G)……高温流体。FIG. 1 is a schematic explanatory view showing a step of inserting a lining tube into a target tube having a bent portion, FIG. 2 is a perspective view of the lining tube, and FIG. 3 is inflated to bring the tube into close contact with the target tube. FIG. 4 is a schematic explanatory view of the inflation process, FIG. 4 is a cross-sectional view of a pipe line after lining work, and FIGS. 5 and 6 are a perspective view and a cross-sectional view showing a modified example of the lining pipe. (A) ... target pipe, (1) (11) (21) ... lining pipe, (2) (12) ... tensile strength reinforcing strip, (3) ... connecting bracket, (4) ... … Tow rope, (5)… through hole,
(6) ... stopper, (G) ... high temperature fluid.
Claims (6)
管体として、上記対象管の内径よりも外径の小さい熱可
塑性樹脂管からなり、周壁に部分的に軸線方向に沿って
1ないし複数条の抗張性補強条が埋設された保形性のあ
る管体を用い、該管体を内部に高温流体を導入すること
によって加熱軟化させながら一端より牽引して前記対象
管内に挿入し、次いで上記高温流体の圧力を上げて管体
を膨張させ対象管の内面に密着させたのち、冷却固化さ
せることを特徴とする管の内面ライニング工法。1. A lining pipe to be lined with an inner surface of a target pipe is made of a thermoplastic resin pipe having an outer diameter smaller than an inner diameter of the target pipe, and one or a plurality of pipes are formed on a peripheral wall along an axial direction partially. Using a tubular body having a shape-retaining property in which the tensile strength reinforcing strip of the strip is buried, the tubular body is inserted into the target pipe by being pulled from one end while being softened by heating by introducing a high-temperature fluid into the inside, Then, the pressure of the high-temperature fluid is increased to expand the tube so that the tube is brought into close contact with the inner surface of the target tube, and then cooled and solidified.
状体からなり、その片面を管体の外周面に露出状態にし
て埋設されてなる請求項(1)記載の管の内面ライニン
グ工法。2. The inner surface of a pipe according to claim 1, wherein the tensile reinforcing strip is formed of a narrow band made of woven organic fiber, and one side thereof is exposed to the outer peripheral surface of the tube. Lining method.
内面に密接せしめるライニング用管体であって、保形性
のある熱可塑性合成樹脂管からなり、周壁に部分的に軸
線方向に沿って1ないし複数条の抗張性補強条が埋設さ
れてなることを特徴とする管の内面ライニング用管体。3. A lining tube which is inserted into a target tube and then expanded to be brought into close contact with the inner surface of the target tube. The lining tube is made of a thermoplastic synthetic resin tube having a shape-retaining property, and is partially formed along a peripheral wall along an axial direction. A tube for inner lining of a pipe, wherein one or more tensile reinforcing strips are embedded.
面を外周面に露出状態にして管体に埋設されてなる請求
項(3)記載の管の内面ライニング工法及びライニング
用管体。4. The inner surface lining method and lining method of a pipe according to claim 3, wherein the tensile reinforcing strip is formed of a narrow band-shaped body, and is buried in the pipe with one surface exposed to the outer peripheral surface. Tube.
求項(4)に記載の管の内面ライニング用管体。5. The tube for lining the inner surface of a tube according to claim 4, wherein the tensile reinforcing strip is made of an organic fiber woven fabric.
隔に埋設されてなる請求項(4)または(5)記載の管
の内面ライニング用管体。6. A pipe for lining the inner surface of a pipe according to claim 4, wherein a plurality of the tensile reinforcing strips are buried on the outer peripheral surface of the pipe at equal intervals.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2310789A JP2735856B2 (en) | 1989-02-01 | 1989-02-01 | Inner surface lining method of pipe and lining pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2310789A JP2735856B2 (en) | 1989-02-01 | 1989-02-01 | Inner surface lining method of pipe and lining pipe |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH02202431A JPH02202431A (en) | 1990-08-10 |
JP2735856B2 true JP2735856B2 (en) | 1998-04-02 |
Family
ID=12101248
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2310789A Expired - Lifetime JP2735856B2 (en) | 1989-02-01 | 1989-02-01 | Inner surface lining method of pipe and lining pipe |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2735856B2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2140925C (en) * | 1993-05-24 | 2005-02-22 | Hiroyuki Sakuragi | Repairing pipe, method for repairing pipe lines therewith and method for removing the repairing pipe |
JP6570358B2 (en) * | 2015-07-23 | 2019-09-04 | 芦森工業株式会社 | Existing line lining method |
CN114414176B (en) * | 2022-03-30 | 2022-06-03 | 风凯换热器制造(常州)有限公司 | Processing method and leakage detection method for double-layer conveying pipeline |
-
1989
- 1989-02-01 JP JP2310789A patent/JP2735856B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH02202431A (en) | 1990-08-10 |
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